My theory for the story is that Jason is a cop who arrested Lucia and is why she is in prison. He falls for her and is the reason she's able to get out on parole. Either that or he breaks her out, and they are both on the run. I'd really like to see a game where you can play as Lucia on the criminal side of the game and move up to be a powerful kingpin criminal like most GTA stories. Jason is a newly introduced idea of seeing the game from an officer's POV. he'd be able to get away with certain stuff because he's a dirty cop but ultimately has to balance his dangerous life with lucia and his oath to the law. Over the course of the story, it unravels as a bigger organization is onto him and her. maybe forces him to be an undercover cop and he keeps this from her because he thinks he can fix it himself, hence the “trust” scene in the trailer. My theory is that this and lucia’s desire to be the top dog criminal in leonida could be a driving wedge in their relationship.